Made from our HYPER-FLEX formula for extreme durability. Suggested uses include control arms, track rods, 4 link bars, push or nerf bars, tire carrier racks, engine/transmission mounts. Please note the proper preloads are calculated based on the dimensions listed in the chart. A non-preloaded bushing is not recommended. Only use DOM tubing or equivalent with no seam on ID of tubing. Each set includes 4-bushings and 2-sleeves. Outer tube and fastners are not included.